Peterbilt 388 Medium 4.5" Sidewall Front Fender Set
Upgrade your rig with the Peterbilt 388 Medium 4.5" Sidewall Front Fender Set, designed for balanced coverage, clean styling, and long-lasting durability. Built specifically for the Peterbilt 388, these premium fiberglass front fenders deliver a professional factory-fit appearance with a custom edge.
Constructed from high-quality fiberglass, this fender set is engineered to handle daily road stress while maintaining structural strength and a smooth finish. The 4.5" sidewall design offers the perfect balance between low-profile styling and practical tire coverage, making it ideal for both work trucks and show builds.
The surface comes in a smooth gel coat finish, fully paint-ready for custom color matching or OEM-style finishing.
Features
- Custom fit for Peterbilt 388
- 4.5" medium sidewall for balanced coverage
- Durable fiberglass construction
- Smooth paint-ready gel coat finish
- Lightweight yet strong design
- Built for long-term road durability
- Sold as a pair (2 fenders)
Important Information
- Ships are gel-coated and require painting
- Dry fit before final installation
- Professional installation recommended
- Painted products are non-returnable
- Mounting hardware may vary depending on the setup
Have Questions?
Check out our Bad Ass FAQ and get answers before you buy.
Specifications
| Technical Specifications | |
| Single Fender Weight | 38 |
| Fender Set Weight | 76 |
| Material | 1/4" Fiberglass |
| Coating | Marine Grade Gray Gel Coat - Paint Ready |
| Liner | ArmorCore Advantage™ Liner - Lifetime Warranty Against Spider Cracks |
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Every semi truck fender we build is made in the USA and backed by a lifetime warranty—so you get parts that don't just look tough, they perform. When you run Bad Ass fiberglass fenders, your truck is ready for whatever the road throws at it.














